1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.orchestra.conversation.spring;
20
21 import org.apache.commons.logging.Log;
22 import org.apache.commons.logging.LogFactory;
23 import org.springframework.aop.target.AbstractBeanFactoryBasedTargetSource;
24 import org.springframework.beans.factory.BeanFactory;
25 import org.springframework.beans.factory.ObjectFactory;
26
27 /**
28 * Used with a "scoping proxy" object as generated by _SpringUtils.newProxy.
29 * <p>
30 * When user code invokes any method on the proxy, it invokes getTarget on its
31 * source object to get the "real" object, then invokes the same method on the
32 * returned object.
33 * <p>
34 * Here the getTarget method is implemented by using an AbstractSpringOrchestraScope
35 * object to look up the ConversationContext for the user, then a particular
36 * Conversation instance (by name), then a bean within that Conversation.
37 * <p>
38 * TODO: deal with serialization issues here. When an http session containing
39 * conversation-scoped beans is serialized, instances of this type will of course
40 * be serialized too. But the "scope" and "objectFactory" members here are not
41 * serializable. Somehow instances of this class need enough information to
42 * relocate the appropriate objects on deserialization.
43 *
44 * @since 1.1
45 */
46 public class ScopedBeanTargetSource extends AbstractBeanFactoryBasedTargetSource
47 {
48 private AbstractSpringOrchestraScope scope;
49 private String conversationName;
50 private String targetBeanName;
51 private ObjectFactory objectFactory;
52
53 public ScopedBeanTargetSource(
54 AbstractSpringOrchestraScope scope,
55 String conversationName,
56 String targetBeanName,
57 ObjectFactory objectFactory,
58 BeanFactory beanFactory)
59 {
60 this.scope = scope;
61 this.conversationName = conversationName;
62 this.targetBeanName = targetBeanName;
63 this.objectFactory = objectFactory;
64
65 super.setTargetBeanName(targetBeanName);
66 super.setBeanFactory(beanFactory);
67 }
68
69 public Object getTarget() throws Exception
70 {
71 final Log log = LogFactory.getLog(ScopedBeanTargetSource.class);
72 if (log.isDebugEnabled())
73 {
74 log.debug("getRealBean for " + targetBeanName);
75 }
76 return scope.getRealBean(conversationName, targetBeanName, objectFactory);
77 }
78 }